Re: [TenTec] Orion II - Tech Topics

[Martin AA6E <aa6e@ewing.homedns.org>]

Sinisa Hristov wrote:
> ...
>
> Stated generally, with all LOs locked to the same reference,
> ANY mixing architecture is equivalent to a single stage mixing
> with an equivalent LO frequency, and the output frequency drift
> is equal to the drift of that equivalent LO.
>
> The change of the mixing scheme in Orion II may have some
> virtues, but the stability improvement is NOT one of them.
>
>
> 73,
>
> Sinisa  YT1NT, VE3EA
Another way to say this is that if your TCXO frequency goes up by 1 ppm, 
your dial reading will go down by 1 ppm. (Neglecting the small matter of 
the unsynchronized A-to-D converter clock.)  This is because the TCXO is 
the only point in the system where a frequency or time scale is defined.
That's the way it is with the Orion.  I don't see how the Orion 2 could 
be significantly different.
73 Martin AA6E